Tool for winding wires onto terminals



J. c. BACH ETAL TOOL FOR WINDING WIRES oN'ro TERMINALS Filed June 17.1960 J fimilww om /NVEN 7095 J. C.BACH W. F: Fl VEK E14. HEYDEN Qu M aBy ATTORNEY July 23, 1963 United States Patent 3,098,615 T091. FORWINDING WIRES ONTO TERMINALS Jacob C. Bach, La Grange, William F.Fiveir, llerwyn,

and Robert A. Heyden, Pains Heights, 111., assign'ors to WesternElectric Company, incorporated, a corporation of New York Filed Jane 17,196i Ser. No. 36,898 2 Claims. (Ci. 242-7) The present invent-ionrelates to tools for winding wires onto terminals, and more particularlyto wire winding tools having spring loaded rotary bits for preventingoverwrapping of the wire.

Heretofore in portable wire winding tools for wrapping wire ontoterminals the rotatable wire winding bit of such a tool was held againstaxial movement relative to the tool housing so that the tool would haveto be withdrawn by the operator in synchronism with the winding of thewire onto the terminal in order to obtain a single layer of winding onthe terminal and prevent the overwrapping of the wire thereon. In theevent that the operator should retract the wire winding tool at a slowerpace than the wire was being wound onto the terminal, the wire wouldoverwrap a portion of the first layer thereof and produce an undesirableconnection with the terminal.

An object of the present invention is to provide an improved tool forwinding wires onto terminals.

Another object of the invention is to provide a wire winding tool havinga spring loaded wire winding bit for preventing the overwrapping of awire being wound onto a terminal.

With these and other objects in mind, the invention contemplates theprovision of a portable wire winding tool having a rotatablemotor-driven driving member provided with a recess for receiving the endof a wire winding bit. The bit is rotatably mounted in the housing ofthe tool for limited axial movement and is connected to the bit-drivingmember for rotation therewith and for axial movement relative thereto,and the bit is urged axially by a spring to a normal forward position sothat in the event the wire winding tool is not retracted by the operatoras rapidly as the wire is being wound onto the terminal during a wirewinding operation, the bit will be moved axially relative to the toolhousing by the wire being wound onto the terminal and thus preventoverwrapping of the wire.

Other objects, advantages and novel aspects of the invention will becomeapparent upon consideration of the following detailed description, inconjunction with the accompanying drawings wherein:

FIG. 1 is a longitudinal sectional elevational view of a wire windingtool embodying the present invention;

FIG. 2 is a \cross sectional view of the wire winding tool taken on line2-2 of FIG. 1',

FIG. 3 is a fragmentary view of several of the components of the tool inseparated relation to each other;

and

FIG. 4 is a view of a wire wound onto a terminal with the present tool.

Referring to FIG. 1 of the drawings, the wire winding tool comprises ahousing 12 enclosing an air-driven motor 14 and having a handle 16 bymeans of which the tool may be gripped by an operator. Compressed air issupplied to the air motor through a flexible tube 17 and the motor isoperated under control of a trigger 18. The air motor is connected toand rotates a driving or bit receiving member 20 which is supported in acomposite hollow nose section 22 extending forwardly from the housing 12and secured thereto by a nut 23. At its forward end the driving member20 is provided with an axially disposed cylindrical recess 24 forreceiving one 3,098,615 Patented July 23, 1963 ice end 26 of a one-piecereplaceable wire winding bit 28. The bit 28 is rotatably supported in atubular member 3% which extends forwardly from the nose section 22 andis supported in a split chuck 31. The chuck 31 is pressed into the endof the nose section 22 and has a nut 32 which may be turned for clampingor releasing the tubular member 30.

At its forward end the bit 28 is provided with an axially disposedrecess 34 and a longitudinally disposed peripheral groove 36 which serverespectively to receive a terminal 38 and a wire 39 preparatory to thewinding of the wire onto the terminal.

The other end 26 of the bit is rabbeted at 42 to provide a fiat portion43 which cooperates with a pin 44 in the driving member '20 to effect adriving connection between the driving member 20 and the bit 28 forimparting rotation to the bit while permitting axial movement of the bitrelative to the driving member. A circular plug 45 is slidably mountedin the cylindrical recess 24 in engagement with the end of the windingbit 28, and a spring 46 interposed between the plug 45 and the end ofthe recess 24 serves to urge the plug and the bit 28 axially outwardly.

The inner end of the tubular member 30 engages a shoulder 4% formed onthe enlarged end 26 of the bit 28 and serves to stop the bit in a normaloperative position shown in FIG. 1. By loosening the chuck nut 32 andwithdrawing the tubular member 30 the bit 28 may be removed andreplaced.

From the foregoing it will be evident that the winding bit 28 isyieldably maintained in its normal operative position and is capable ofbeing moved axially by the wire 39 being wound onto the terminal 38 toprevent overwrapping of the wire if the wire winding tool 10 is notwithdrawn or is withdrawn too slowly from the terminal during the wirewinding operation.

In the operation of winding a wire 39 around a terminal 3%, the baredwire 39 of an insulated conductor is inserted into the longitudinalgroove 36 in the bit 28 and bent laterally into a notch 52 in the end ofthe tubular member 39 after which the wire winding tool is movedrelative to the terminal to effect the insertion of the terminal 38 intothe recess 34 of the bit. The operator then depresses the trigger 18 toeffect the operation of the air motor and the rotation of the bit 28. Asthe bit 28 winds the wire 39 onto the terminal 38, the operator normallywithdraws the tool 19 in timed relation thereto. In the event that theoperator fails to withdraw the wire-winding tool 19 rearwardly as fastas the wire 39 is being wound onto the terminal, the wire 39, as it isbeing wound, will apply a force to the bit 28 in an axial direction andimpart axial movement thereto serving to compress the spring 46 andpermit the completion of the winding of the wire in a single layer andthus prevent the overwrapping of portions of the wire 39.

It is to be understood that the above-described arrangements are simplyillustrative of the application of the principles of this invention.Numerous other ardriving member for rotational movement, means removablyattached to said housing for supporting said bit for rotational movementand for engaging said shoulder to limit axial movement in a directionaway from said bit driving member, and spring means interposed betweensaid bit and said bit driving member for axially moving said bit intoengagement with said shoulder.

2. A tool for winding a wire onto a terminal, comprising a housingincluding a tube removably secured to the housing and forming a portionthereof, a driving member supported on said housing for rotation aboutthe axis of said tube and against axial movement and having an axiallydirected cylindrical recess closed at one end, means on said housing forrotating said driving member, a wire winding bit supported in said tubefor rotation and for axial movement, said bit having a head at one endthereof slidable axially in said recess in said driving member andprovided with a shoulder engageable with one end of said tube forlimiting the axial movement of said bit away from said driving member toa normal operative position, a helical compression spring in the closedend portion of said recess of said driving member, a cylindrical plugslidable in said recess between and in engagement with said spring andsaid head of said bit, said head of said bit having a rabbeted endportion adjacent to said plug, and a pin on said driving memberextending through said recess in a plane perpendicular to the axis ofsaid tool and cooperable with said rabbeted end portion of said bit foreffecting a rotary drive connection between said driving member and saidbit while permitting axial movement of said bit, the other end of saidbit being provided with an axial recess and an eccentric longitudinallydisposed recess for receiving a terminal and a wire respectively.

References Cited in the file of this patent UNITED STATES PATENTS2,725,198 Reck Nov. 29, 1955 2,758,797 Miklau Aug. 14, 1956 2,789,597Torre Apr. 23, 1957 FOREIGN PATENTS 317,421 Italy May 8, 1934

1. A WIRE WINDING TOOL COMPRISING A WIRE WINDING BIT HAVING A LATERNALLYPROJECTING SHOULDER, A BIT DRIVING MEMBER, MEANS INTERCONNECTING SAIDWIRE WINDING BIT AND SAID BIT DRIVING MEMBER FOR ROTATIONAL AND AXIALMOVEMENT OF SAID BIT, MEANS FOR DRIVING SAID BIT DRIVING MEMBER, AHOUSING FOR SUPPORTING SAID DRIVING MEANS AND SAID BIT DRIVING MEMBERFOR ROTATIONAL MOVEMENT, MEANS REMOVABLY ATTACHED TO SAID HOUSING FORSUPPORTING SAID BIT FOR ROTATIONAL MOVEMENT AND FOR ENGAGING SAIDSHOULDER TO LIMIT AXIAL MOVEMENT IN A DIRECTION AWAY FROM SAID BITDRIVING MEMBER, AND SPRING MEANS INTERPOSED BETWEEN SAID BIT AND SAIDBIT DRIVING MEMBER FOR AXIALLY MOVING SAID BIT INTO ENGAGEMENT WITH SAIDSHOULDER.